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2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390 
 kernel/drivers/media/usb/zr364xx/zr364xx.c
....@@ -1,8 +1,9 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Zoran 364xx based USB webcam module version 0.73
34  *
45  * Allows you to use your USB webcam with V4L2 applications
5
- * This is still in heavy developpement !
6
+ * This is still in heavy development !
67  *
78  * Copyright (C) 2004  Antoine Jacquet <royale@zerezo.com>
89  * http://royale.zerezo.com/zr364xx/
....@@ -11,16 +12,6 @@
1112  * V4L2 version inspired by meye.c driver
1213  *
1314  * Some video buffer code by Lamarque based on s2255drv.c and vivi.c drivers.
14
- *
15
- * This program is free software; you can redistribute it and/or modify
16
- * it under the terms of the GNU General Public License as published by
17
- * the Free Software Foundation; either version 2 of the License, or
18
- * (at your option) any later version.
19
- *
20
- * This program is distributed in the hope that it will be useful,
21
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
22
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
23
- * GNU General Public License for more details.
2415  */
2516 
2617 
....@@ -29,7 +20,6 @@
2920 #include <linux/usb.h>
3021 #include <linux/vmalloc.h>
3122 #include <linux/slab.h>
32
-#include <linux/proc_fs.h>
3323 #include <linux/highmem.h>
3424 #include <media/v4l2-common.h>
3525 #include <media/v4l2-ioctl.h>
....@@ -150,7 +140,6 @@
150140 };
151141 
152142 struct zr364xx_fmt {
153
-	char *name;
154143 	u32 fourcc;
155144 	int depth;
156145 };
....@@ -158,7 +147,6 @@
158147 /* image formats.  */
159148 static const struct zr364xx_fmt formats[] = {
160149 	{
161
-		.name = "JPG",
162150 		.fourcc = V4L2_PIX_FMT_JPEG,
163151 		.depth = 24
164152 	}
....@@ -208,11 +196,9 @@
208196 {
209197 	int status;
210198 
211
-	unsigned char *transfer_buffer = kmalloc(size, GFP_KERNEL);
199
+	unsigned char *transfer_buffer = kmemdup(cp, size, GFP_KERNEL);
212200 	if (!transfer_buffer)
213201 		return -ENOMEM;
214
-
215
-	memcpy(transfer_buffer, cp, size);
216202 
217203 	status = usb_control_msg(udev,
218204 				 usb_sndctrlpipe(udev, 0),
....@@ -385,8 +371,7 @@
385371 						  vb);
386372 	int rc;
387373 
388
-	DBG("%s, field=%d, fmt name = %s\n", __func__, field,
389
-	    cam->fmt ? cam->fmt->name : "");
374
+	DBG("%s, field=%d\n", __func__, field);
390375 	if (!cam->fmt)
391376 		return -EINVAL;
392377 
....@@ -521,7 +506,7 @@
521506 	/* tell v4l buffer was filled */
522507 
523508 	buf->vb.field_count = cam->frame_count * 2;
524
-	v4l2_get_timestamp(&buf->vb.ts);
509
+	buf->vb.ts = ktime_get_ns();
525510 	buf->vb.state = VIDEOBUF_DONE;
526511 }
527512 
....@@ -549,7 +534,7 @@
549534 		goto unlock;
550535 	}
551536 	list_del(&buf->vb.queue);
552
-	v4l2_get_timestamp(&buf->vb.ts);
537
+	buf->vb.ts = ktime_get_ns();
553538 	DBG("[%p/%d] wakeup\n", buf, buf->vb.i);
554539 	zr364xx_fillbuff(cam, buf, jpgsize);
555540 	wake_up(&buf->vb.done);
....@@ -570,14 +555,12 @@
570555 {
571556 	unsigned char *pdest;
572557 	unsigned char *psrc;
573
-	s32 idx = -1;
574
-	struct zr364xx_framei *frm;
558
+	s32 idx = cam->cur_frame;
559
+	struct zr364xx_framei *frm = &cam->buffer.frame[idx];
575560 	int i = 0;
576561 	unsigned char *ptr = NULL;
577562 
578563 	_DBG("buffer to user\n");
579
-	idx = cam->cur_frame;
580
-	frm = &cam->buffer.frame[idx];
581564 
582565 	/* swap bytes if camera needs it */
583566 	if (cam->method == METHOD0) {
....@@ -702,16 +685,11 @@
702685 {
703686 	struct zr364xx_camera *cam = video_drvdata(file);
704687 
705
-	strlcpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
688
+	strscpy(cap->driver, DRIVER_DESC, sizeof(cap->driver));
706689 	if (cam->udev->product)
707
-		strlcpy(cap->card, cam->udev->product, sizeof(cap->card));
708
-	strlcpy(cap->bus_info, dev_name(&cam->udev->dev),
690
+		strscpy(cap->card, cam->udev->product, sizeof(cap->card));
691
+	strscpy(cap->bus_info, dev_name(&cam->udev->dev),
709692 		sizeof(cap->bus_info));
710
-	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
711
-			    V4L2_CAP_READWRITE |
712
-			    V4L2_CAP_STREAMING;
713
-	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
714
-
715693 	return 0;
716694 }
717695 
....@@ -720,7 +698,7 @@
720698 {
721699 	if (i->index != 0)
722700 		return -EINVAL;
723
-	strcpy(i->name, DRIVER_DESC " Camera");
701
+	strscpy(i->name, DRIVER_DESC " Camera", sizeof(i->name));
724702 	i->type = V4L2_INPUT_TYPE_CAMERA;
725703 	return 0;
726704 }
....@@ -765,8 +743,6 @@
765743 {
766744 	if (f->index > 0)
767745 		return -EINVAL;
768
-	f->flags = V4L2_FMT_FLAG_COMPRESSED;
769
-	strcpy(f->description, formats[0].name);
770746 	f->pixelformat = formats[0].fourcc;
771747 	return 0;
772748 }
....@@ -1208,15 +1184,11 @@
12081184 	return err;
12091185 }
12101186 
1211
-static void zr364xx_release(struct v4l2_device *v4l2_dev)
1187
+static void zr364xx_board_uninit(struct zr364xx_camera *cam)
12121188 {
1213
-	struct zr364xx_camera *cam =
1214
-		container_of(v4l2_dev, struct zr364xx_camera, v4l2_dev);
12151189 	unsigned long i;
12161190 
1217
-	v4l2_device_unregister(&cam->v4l2_dev);
1218
-
1219
-	videobuf_mmap_free(&cam->vb_vidq);
1191
+	zr364xx_stop_readpipe(cam);
12201192 
12211193 	/* release sys buffers */
12221194 	for (i = 0; i < FRAMES; i++) {
....@@ -1227,9 +1199,19 @@
12271199 		cam->buffer.frame[i].lpvbits = NULL;
12281200 	}
12291201 
1230
-	v4l2_ctrl_handler_free(&cam->ctrl_handler);
12311202 	/* release transfer buffer */
12321203 	kfree(cam->pipe->transfer_buffer);
1204
+}
1205
+
1206
+static void zr364xx_release(struct v4l2_device *v4l2_dev)
1207
+{
1208
+	struct zr364xx_camera *cam =
1209
+		container_of(v4l2_dev, struct zr364xx_camera, v4l2_dev);
1210
+
1211
+	videobuf_mmap_free(&cam->vb_vidq);
1212
+	v4l2_ctrl_handler_free(&cam->ctrl_handler);
1213
+	zr364xx_board_uninit(cam);
1214
+	v4l2_device_unregister(&cam->v4l2_dev);
12331215 	kfree(cam);
12341216 }
12351217 
....@@ -1339,6 +1321,8 @@
13391321 	.fops = &zr364xx_fops,
13401322 	.ioctl_ops = &zr364xx_ioctl_ops,
13411323 	.release = video_device_release_empty,
1324
+	.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1325
+		       V4L2_CAP_STREAMING,
13421326 };
13431327 
13441328 
....@@ -1350,6 +1334,7 @@
13501334 {
13511335 	struct zr364xx_pipeinfo *pipe = cam->pipe;
13521336 	unsigned long i;
1337
+	int err;
13531338 
13541339 	DBG("board init: %p\n", cam);
13551340 	memset(pipe, 0, sizeof(*pipe));
....@@ -1382,9 +1367,8 @@
13821367 
13831368 	if (i == 0) {
13841369 		printk(KERN_INFO KBUILD_MODNAME ": out of memory. Aborting\n");
1385
-		kfree(cam->pipe->transfer_buffer);
1386
-		cam->pipe->transfer_buffer = NULL;
1387
-		return -ENOMEM;
1370
+		err = -ENOMEM;
1371
+		goto err_free;
13881372 	} else
13891373 		cam->buffer.dwFrames = i;
13901374 
....@@ -1399,9 +1383,20 @@
13991383 	/*** end create system buffers ***/
14001384 
14011385 	/* start read pipe */
1402
-	zr364xx_start_readpipe(cam);
1386
+	err = zr364xx_start_readpipe(cam);
1387
+	if (err)
1388
+		goto err_free_frames;
1389
+
14031390 	DBG(": board initialized\n");
14041391 	return 0;
1392
+
1393
+err_free_frames:
1394
+	for (i = 0; i < FRAMES; i++)
1395
+		vfree(cam->buffer.frame[i].lpvbits);
1396
+err_free:
1397
+	kfree(cam->pipe->transfer_buffer);
1398
+	cam->pipe->transfer_buffer = NULL;
1399
+	return err;
14051400 }
14061401 
14071402 static int zr364xx_probe(struct usb_interface *intf,
....@@ -1426,12 +1421,10 @@
14261421 	if (!cam)
14271422 		return -ENOMEM;
14281423 
1429
-	cam->v4l2_dev.release = zr364xx_release;
14301424 	err = v4l2_device_register(&intf->dev, &cam->v4l2_dev);
14311425 	if (err < 0) {
14321426 		dev_err(&udev->dev, "couldn't register v4l2_device\n");
1433
-		kfree(cam);
1434
-		return err;
1427
+		goto free_cam;
14351428 	}
14361429 	hdl = &cam->ctrl_handler;
14371430 	v4l2_ctrl_handler_init(hdl, 1);
....@@ -1440,7 +1433,7 @@
14401433 	if (hdl->error) {
14411434 		err = hdl->error;
14421435 		dev_err(&udev->dev, "couldn't register control\n");
1443
-		goto fail;
1436
+		goto free_hdlr_and_unreg_dev;
14441437 	}
14451438 	/* save the init method used by this camera */
14461439 	cam->method = id->driver_info;
....@@ -1513,7 +1506,7 @@
15131506 	if (!cam->read_endpoint) {
15141507 		err = -ENOMEM;
15151508 		dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
1516
-		goto fail;
1509
+		goto free_hdlr_and_unreg_dev;
15171510 	}
15181511 
15191512 	/* v4l */
....@@ -1524,10 +1517,11 @@
15241517 
15251518 	/* load zr364xx board specific */
15261519 	err = zr364xx_board_init(cam);
1527
-	if (!err)
1528
-		err = v4l2_ctrl_handler_setup(hdl);
15291520 	if (err)
1530
-		goto fail;
1521
+		goto free_hdlr_and_unreg_dev;
1522
+	err = v4l2_ctrl_handler_setup(hdl);
1523
+	if (err)
1524
+		goto board_uninit;
15311525 
15321526 	spin_lock_init(&cam->slock);
15331527 
....@@ -1539,19 +1533,23 @@
15391533 				    V4L2_FIELD_NONE,
15401534 				    sizeof(struct zr364xx_buffer), cam, &cam->lock);
15411535 
1542
-	err = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1);
1536
+	err = video_register_device(&cam->vdev, VFL_TYPE_VIDEO, -1);
15431537 	if (err) {
15441538 		dev_err(&udev->dev, "video_register_device failed\n");
1545
-		goto fail;
1539
+		goto board_uninit;
15461540 	}
1541
+	cam->v4l2_dev.release = zr364xx_release;
15471542 
15481543 	dev_info(&udev->dev, DRIVER_DESC " controlling device %s\n",
15491544 		 video_device_node_name(&cam->vdev));
15501545 	return 0;
15511546 
1552
-fail:
1547
+board_uninit:
1548
+	zr364xx_board_uninit(cam);
1549
+free_hdlr_and_unreg_dev:
15531550 	v4l2_ctrl_handler_free(hdl);
15541551 	v4l2_device_unregister(&cam->v4l2_dev);
1552
+free_cam:
15551553 	kfree(cam);
15561554 	return err;
15571555 }
....@@ -1598,10 +1596,19 @@
15981596 	if (!cam->was_streaming)
15991597 		return 0;
16001598 
1601
-	zr364xx_start_readpipe(cam);
1599
+	res = zr364xx_start_readpipe(cam);
1600
+	if (res)
1601
+		return res;
1602
+
16021603 	res = zr364xx_prepare(cam);
1603
-	if (!res)
1604
-		zr364xx_start_acquire(cam);
1604
+	if (res)
1605
+		goto err_prepare;
1606
+
1607
+	zr364xx_start_acquire(cam);
1608
+	return 0;
1609
+
1610
+err_prepare:
1611
+	zr364xx_stop_readpipe(cam);
16051612 	return res;
16061613 }
16071614 #endif